Optical fiber amplifier for achieving high gain of small signal

A fiber amplifier and fiber amplification technology, which is used in lasers, laser devices, laser parts, etc., can solve problems such as the inability of pump light to effectively convert signal light energy, the low amplification efficiency of fiber amplifiers, and the limitation of small signal gain.

Inactive Publication Date: 2003-07-09
SAMSUNG ELECTRONICS CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the intensity of the signal light is very low, once the signal light passes through the EDF, the ordinary fiber amplifier cannot effectively change enough erbium excited by the high-intensity pump light to the ground state
Therefore, the overall amplification eff

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber amplifier for achieving high gain of small signal
  • Optical fiber amplifier for achieving high gain of small signal
  • Optical fiber amplifier for achieving high gain of small signal

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] refer to figure 2 , the fiber amplifier for realizing small signal high gain according to the embodiment of the present invention includes: a pump laser diode (LD) 210, a wavelength division multiplexer (WDM) 220, an erbium-doped fiber (EDF) 230, a coupler 240 and a circulator 200 .

[0020] The pump LD 210 provides a light source for pumping ground-state erbium ions in the amplifying medium EDF to amplify low-intensity input signal light.

[0021] The WDM 220 couples the input signal light and the pump light output from the pump LD 210 into the optical fiber, and sends the coupled input signal light to the EDF 230 .

[0022] The EDF 230 amplifies the input signal light from the WDM 220 with the pump light of the pump LD 210 and amplifies the feedback signal light returned from the coupler 240 into the EDF 230 .

[0023] Coupler 240 is a 1550 nm 50:50 coupler which is connected in the form of a loop reflector and reflects the incident signal light amplified in EDF 23...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An optical fiber amplifier for achieving high gain of a small signal, including a pump laser diode (LD) for applying pumping light to amplify weak incident signal light, a wavelength division multiplexer (WDM) for coupling the incident signal light and the pumping light output from the pump LD into an optical fiber, a fiber amplification medium, a coupler with a loop mirror and a circulator in front of the WDM. Therefore, high gain of a small signal can be achieved in the entire wavelength range between 1530 nm and 1560 nm, and the difference in gain between wavelengths can be remarkably narrowed compared to an existing method using an EDF having the same length as the EDF used in the optical fiber amplifier.

Description

technical field [0001] The invention relates to an optical fiber amplifier, in particular to an optical fiber amplifier which uses an optical fiber coupler connected in the form of a loop reflector to improve the gain of low-intensity small signals. Background technique [0002] In the field of general long-distance communication repeaters, the traditional optical communication relay is carried out in this way: convert the weakened optical signal into an electrical signal, amplify the electrical signal, and then convert the amplified electrical signal into light signal. This relay method greatly increases the size of the relay amplifier system, depending on the transmission rate. Using an optical fiber amplifier that amplifies optical signals as a repeater can overcome the above problems and effectively amplify optical signals. [0003] One of such optical fiber amplifying repeaters, erbium-doped fiber amplifier (EDFA), is attracting attention as a new generation optical r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01S3/063G02B26/00H01S3/06H01S3/067H01S3/10H01S3/23
CPCH04B10/2912H01S3/2333H01S3/10023H04B10/291G02B26/00
Inventor 黄星泽
Owner SAMSUNG ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap